In general, the heavier atoms in the atmosphere sink and the light ones remain at the surface, which is why some white dwarfs, for example, have mostly pure hydrogen or helium atmospheres.
总体来说，较重的原子在大气圈中沉积，而较轻的原子则存在于大气圈表面，这也是一些白矮星具有较纯净的氢和氦大气圈的原因。
Critics point out that, for a country with neither adequate data centers or Internet connectivity, the cost of connectivity dwarfs the cost of building out the data centers.
评论家指出，对于一个不具备足够数据中心或者互联网连接速率的国家而言，连接成本远远超过了建造数据中心的成本。
These time differences alone were enough to confirm that these bodies are definitely planets, and not brown dwarfs or other stars.
这种时间间隔的差异，足以表明该星体绝对是行星，而不是褐矮星，或其它星体。
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